11/27/19 - This is a rare find and perhaps as complete and perfect such an assembly you could ever come across. This is a fully automatic (and fully transferable) Colt M16A1 in its original, matching box. It even comes with the serialized Colt plastic bag the rifle shipped in! The grouping comes with three Colt magazines, and one spare upper, which is heavy duty and more specifically designed for the sustained rate of fire from this rifle. Such an upper assembly on its own can be $1500-2000. The gun shows virtually no signs of use, and includes the factory original stock and upper with this listing. The spare upper is a 14 inch barrel, and original is 12 inch. If you are looking for a top of the line full-auto experience, this grouping is the one for you.